Re: [lcd4linux] parallel port access problem (re-post from LEAF mailing list)

[Michael R. <re...@eu...>]

Hi Kevin,

> i posted this yesterday on the leaf mailing list, was hoping to get a
> fix soon and it's not had any hits yet, so i'm re-posting - hope
> that's not a problem.
No. it is not.

> the lcd4linux module can't gain access to the parallel port.
> i'm using bering-uClibc, 2.1 on a EPIA 5000 mini-itx motherboard.
> 
> on startup i'm loading the ppdev.o, parport.o, and parport_pc.o
> modules and the messages file under /var/log shows "parport0: PC-style
> at 0x378 [PCSPP(,...)]" on boot-up.
> 
> however, when i run the lcd4linux module - after everything
> initializes and it goes to set up the parallel port i get:
> parport.c: using ppdev /dev/parport0
> parport: open(/dev/parport0) failed: No such device
> HD44780: could not initialize parallel port!
> 
> any assistance would be appreciated, i'm not sure why it says there's
> no device parport0, since it seems to initialize properly on boot-up.

Hmmm...

- is there a /dev/parport0 device file? (or is it called /dev/parport/0)?

- what's the major/minor number of /dev/parport0?

- as a quick hack, you could try to specify "Port 0x378" in your 
lcd4linux.conf. Then it will not use ppdev, but raw port i/o (which is 
ugly, but if it works... who cares :-)


bye, Michael

-- 
Michael Reinelt <re...@eu...>
http://members.eunet.at/reinelt
GPG-Key 0xDF13BA50
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